219935344649972 has 54 divisors (see below), whose sum is σ = 448147561068018. Its totient is φ = 94169238333408.

The previous prime is 219935344649903. The next prime is 219935344649981. The reversal of 219935344649972 is 279946443539912.

It can be written as a sum of positive squares in only one way, i.e., 157017039054736 + 62918305595236 = 12530644^2 + 7932106^2 .

It is a junction number, because it is equal to n+sod(n) for n = 219935344649893 and 219935344649902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 220977398 + ... + 221970450.

It is an arithmetic number, because the mean of its divisors is an integer number (8299028908667).

Almost surely, 2^{219935344649972} is an apocalyptic number.

It is an amenable number.

219935344649972 is an abundant number, since it is smaller than the sum of its proper divisors (228212216418046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

219935344649972 is an equidigital number, since it uses as much as digits as its factorization.

219935344649972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995197 (or 994125 counting only the distinct ones).

The product of its digits is 3174474240, while the sum is 77.

The spelling of 219935344649972 in words is "two hundred nineteen trillion, nine hundred thirty-five billion, three hundred forty-four million, six hundred forty-nine thousand, nine hundred seventy-two".